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CVE-2026-32792 is a denial-of-service vulnerability in NLnet Labs Unbound affecting versions 1.6.2 through 1.25.0 when the software is compiled with DNSCrypt support enabled. The flaw is in the DNSCrypt packet reading logic: a malformed DNSCrypt query whose decrypted plaintext is composed entirely of zero bytes and lacks the expected 0x80 marker can trigger an underflow condition in the packet-reading procedure. As a result, Unbound may continue reading past the intended bounds of the buffer while searching for a non-zero marker byte. Depending on allocator behavior and heap layout, this out-of-bounds read progression can lead to a heap overflow and subsequent process crash. If the overflow condition is not reached, later packet validation logic rejects the malformed packet.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
10 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.